9
920-087-02 (9-03)
If the wall is thicker than allowed in the notes in Figure 6, a sheet
metal wall sleeve extension and ashing MUST be used.
Installation Instructions for the PXWE – 4" Wall Sleeve
Extension
The following points MUST be considered when installing a wall
sleeve extension:
1 Provision must be made to direct excess condensate from
the back of the wall sleeve into the extension then outside
the building or to a drainage system.
2. Air bafes must be mounted to properly direct air ow to and
from the condenser.
3. The wall sleeve extension design must allow for the proper
mounting of the grille.
4. Caulking is required at all sites where condensate or external
water could potentially inltrate into the building.
5. Fabricate and install metal ashing in wall to serve as a drip
panel. Refer to drawing for more information.
6. Condensate notches and overow slots must be kept clear
of sealant and gaskets so condensate can ow freely into the
wall sleeve extension.
NOTE: Improper fabrication or installation of a wall sleeve extension
will impair PTAC performance.
Extension Installation
Secure the wall sleeve extension to the wall sleeve before installing
it in the wall. Refer to Figure 8 for a guide for fabrication of a
condensate drip panel. The panel MUST extend the full depth of
the wall sleeve and the wall sleeve extension.
Pay particular care in sealing and caulking the panel where it makes
contact with the wall sleeve (see Figure 8). After installation in the
wall, secure with fasteners through the sides. Use a good grade
of silicone sealant around the sleeve extension. Seal all exposed
screw heads. When the installation is complete, the outside grille
should be attached to the wall sleeve extension.
Section II — Deep Wall Installation (PXWE)
Wall Sleeve Extension Sealant Locations
IMPORTANT NOTE: The silicone bead MUST extend 3"
up the side of the two anges to prevent condensate
from leaking.
Wall Sleeve Extension, 42" X 16" Frame, 20 gauge minimum, painted or aluminium
Outside Edge
Insulation
Wall Sleeve
Air Bafes
Condensate
Notches (4)
Condensate
Drip Panel
(Field
Supplied)
Sealant inside (4) bottom corners
Drip
Edge
Width of Wall
Figure 8
PXWE Wall Sleeve
Extension
